Automatic lock device for doors



C. F. EEADLEY. AUTOMATIC LUCK DEVISE FORA OORS.

APPLICATION FILED FEB. L5, 191,9.v

Patnted Apr. 2Q, 1920.

CHARLES F. BRADLEY, OF NEW YORK, N. Y.

AUTOMATIC LOCK DEVICE FOR DOORS.

Application filed February 15,` 1919.

To all wlmi/t t may concern.'

Be it known that I, CHnnLEs F. BRAD- LEY, a citizen of the United States, and residing at New York, in the county of New York andState of New York, have invented certain new and useful mprovements in Automatic Lock Devices for Doors, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

r1`his invent-ion relates to lock devices for doors and particularly for use in connection with what are known as elevator and dumbwaiter doors of various kinds and classes, and particularly to the doors of duinbwai'ters and elevators of apartment houses and various other' public and private buildings; and the object of the invention is to provide a device of the class specified which is so constructed that the operation thereof prevents the opening of more than one door in an elevator or dumbwaiter shaft at a time, or in other words the lock device or devices employed are actuated in the opening of one door in a shaft to lock all of the other doors in said shaft against opening; and with this and other objects in view the invention consists in a device of the class and for the purpose specified, construct-eiland operating as hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Figure 1 is a'sectional view of an elevator shaft and showing a number of my improved lock devices and method of their operation; and,

Fig. 2 a section on the line 2-2 of Fig. 1.

In the drawing I have shown at 5 an elevator shaft provided with four door openings 6, 7, S and 9 closed by doors 10, 11, 1 2 and 13, the door 10 being the bottom door, and in the construction shown being composed of a single member, while the doors 11, 12 and 13 are composed of two members movable in opposite directions.

The above described construction involving the shaft 5, the door openings 6-9 and doors 10-13 may be of any desired forni and construction as this forms no part of my invention and is merely shown to illustrate one use of my improved lock devices 14.

The lock devices 14 consist of levers piv- Specicaton of Letters Eatent.

Patented Apr. 20, 1920.

Serial No. 277,238.

oted centrally as shown at 15 at the opposite sides of the elevator shaft 5 in any desired manner, and the opposite ends of the lock devices 14 are provided with inwardly directed `vshaped heads 16 and 17, which operate in connection with shoe portions 18 at the opposite sides of the doors 10-13, or one of the members thereof, said shoe por tions being curved inwardly at the topas shown at 19 to receive the inwardly directed V-shaped portions 16 and 17 of the lock devices 1.4.

In setting up or in attaching a plurality of my improved lock devices 14 to an elevator shaft, said lock devices are located alternately at the opposite sides of the doors as is illustrated in Fig. 1, and the intermediate doors between the bottom and top doors 10 and 13 are provided at the top thereof with cross rods 20 slidably mounted in suitable keepers 21, and these rods also pass through the curved portions 19 of the shoes 18 and are adapted to operate in con-- nection with the inwardly directed V -shaped portions 16 and 1T of the lock devices 14.

In the normal position of the lock devices 14, or when all of the doors 10-13 are closed, the same will be in a vertical position or in a position parallel with the vertical alinement of the doors, and in this position of the lock devices any one of the doors 10-13 may be opened, and in the drawing I have shown the door 12 in its open position, and in the operation of opening said doors the shoe portions 18 at the opposite sides of the top member of the door will force the lower end portion of the upper lock device 14 shown at 22 outwardly, and the upper end portion of the intermediate lock device 14 shown at 23 outwardly, which in turn forces the opposite end portions of said lock devices at 22 and 23 inwardly, which operation locks the upper door 13 against opening and the door 11 against opening, and it will also be noted that the inward movement of the lower end portion of the lock device 23 moves the rod 20 transversely of the door 11 to force the upper end portion of the lower lock device 14 shown at 24 outwardly, which moves the other end portion of said lock device 24 inwardly to lock the bottom door 10 against opening.

After the door 12 has been closed the lock devices 14` or said lock devices designated by the reference characters 22, 23 and 24 'intermediate doors between the top and bottom doors in the shaft are provided With transversely movable members which serve to transmit the movement of the lock devices from one door to another; thus when one door in a shaft is open locking all of the other doors in said shaft, and While I have shown a construction for carrying` my invention into effect, it will be understood that my invention is not limited thereto, and various changes therein and modifications thereof may be made, Within the scope of the appended claims, Without departing from the spirit of my invention or sacrificingits advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

l. The herein described means for automatically locking all the doors of a dumbwaiter and elevator shaft when one of said doors is opened, said means consisting of lock devices alternately arranged at the opposite sides of the doors in said shaft and operating in connection With one end portion of each of said doors.

2. The herein described means for automatically locking all the doors of a dumb- Waiter and elevator shaft when one of said doors is opened, said means consisting of lock devices alternately arranged at the opa plurality of lock devices alternately arranged at the oppositesides of the doors in the shaft and pivoted tosaid shaft in such manner that the opposite end portions( v of said lock devices operate in connection with the end portions of the doors, and means carried by a predetermined number of the doors in said shaft for transmitting the movement of said lock devices one to another when one door in the shaft is opened to move said lock devices in position to lock the other doors in said shaft.

4. In an apparatus of the class described, a dumbwaiter or other elevator shaft provided With a plurality of doors, all of which are normally closed, and mechanical means whereby the opening of any one of said doors will automatically and mechanically lock all of the other doors.

In testimony that I claim the foregoing as my invention l have signed my name in presence of the subscribing Witnesses this 13th day of February, 1919.

CHARLES F. BRADLEY.

Vitnesses C. E. MULREANY, H. E. THOMPSON. 

